2 / 27
allied
academies
Mater Sci Nanotechnol 2017
Volume 1 Issue 3
Magnetic Materials 2017
Notes:
Page 74
October 09-10, 2017 London, UK
International Conference on
Low-temperature anomalies in thermal properties
of YbB
50
boride
Nikolay A Zhemoedov
Bryansk State University, Russia
H
eat capacity and thermal expansion of YbB
50
boride have
been studied at 2-300 K. The sharp anomaly at about
5 K and smooth humps of the studied properties of boride at
elevated temperatures was detected. The excess heat capacity
and abnormal contribution to the thermal expansion of YbB
50
have been determined by comparison with a paramagnetic
LuB
50
compound. Low-temperature anomalies of YbB
50
thermal
characteristics have been attributed to the magnetic phase
transition to the antiferromagnetic state. The anomalies at 50-
150 K temperature region were satisfactory described as results
of the ground level splitting by the crystal an electric field (CEF).
The scheme of CEF splitting was proposed.
Figure 1:
Heat capacity of YbB50 and LuB50. The excess
heat capacity ΔC(Т) and Schottky contribution CSch(Т) to the
ytterbium boride heat capacity. Insert: CEF-splitting scheme
of the ground f-level Yb3+ ion.
Biography
Nikolay A Zhemoedov has completed from Bryansk State University at the age
of 22 years. Now he is is a Post-graduate student at Bryansk State University.
The field of his scientific interest is low-temperature physics of crystals, which
are perspective in modern areas of technology. His research is supported by
a grant from the Russian Science Foundation (Project "Development of new
thermoelectric materials based on clathrates and clathrate-like substances",
No. 16-12-00004, 2016-2018). He took part in some International conferences
on the physics and chemistry of borides. He has four publications in reputed
journals that have been cited 7 times and two presentations on international
conferences. His h-index is two.
zhemoedov.nikolay@gmail.comNikolay A Zhemoedov, Materials Science and Nanotechnology